Automatic drill press



July 17, 1923- C. ,E. COX

AUTOMATIC DRILL PRESS 4 She ets-Shee t 1 Filed July 19, 1920 m a m. 5

mamas July 17,1923- 7 C. E. COX

AUTOMATIC DRILL PRES S 4 Sheets-Sheet 2 A TTOH/VEYS I I c E. cpx

AUTOMATIC DRILL PRESS l v Filed July 19', 1920 4 Sheets-Sheet 3 IATTORNEYS July 17,. 1923- C. E. COX

v AUTOMATIC DRILL PRESS Filed July 19, 1920 4 Sheets-Sheet 4 a1: vgg

ATTORNEYS July 17, 1923.

CHARLES E. COX, OF FREE PORT, ILLINOIS.

AUTOMATIC DRILL PRESS.

Application filed. July 19 7'0 all whom it may concern:

Be it known that I, CHARLES E. Cox, a citizen of the United States, anda resident of Freeport, in the countyof Stephenson and State ofIllinois, have invented a new and useful Improvement in 1 AutomaticDrill Presses, of which the following is a full, clear, and exactdescription.

My invention relates to improvements in automatic drill presses, and itconsists in the combinations, constructions and arrange-- ments hereindescribed and claimed.

An object of my invention is to provide a device in which there is anovel arrangement for elevating and lowering the drill spindle. Afurther object of my invent-ion is to provide an automatic drill presshaving a magazine in which a plurality of tools may be carried withmeans for bringing any desired tool into operative relation with thedrill spindle.

A. further object of my invention is to provide a novel means forlocking the tool carrying mechanism in position for releasing it atwill.

A further object of my invention is to pro vide a novel means forraising and lowering the work table.

Other objects and advantages will appear in the following specification,and the novel features of the invention will he particularly pointed outin the appended claims.

My invention is illustrated in the accompanying drawings, forming partof this application, in which Figure 1 is a side elevation of one formof the device,

Figure 2 is a sectional detail view showing a portion of the spindleshaft and its clutch connections,

Figure 3 is a section along the line 8-3 of Figure 2,

Figure 1 is a side elevation of a modified form of the device,

Figure 5 is a fragmentary view of a portion of the mechanism for raisingand lowering the work table shown in Flgure 4,

Figure 6 is a fragmentary sectional view of the portion shown in Figure5 looking at right angles thereto, 3

Figure 7 is a detail view of a portion of the locking mechanism for themagazine shown in Figure l,

Figure 8 is a detail view of a portion of the mechanism shown in Figure4,

Figure 9 is a detail view of the clutch 1920. Serial NO. 397,252.

mechanism for raising and lowering the magazine shown in Figure 4:,

Figure 10 1s a sectional detail view of a ing the spindle shaft.

Figure 11 is a plan view of a modified form of magazine,

Figure 12 is a side view of the modified form of the magazine shown inFigure 11,

Figure 13 is a side elevation of another modified form of the device,

Figure 14: is a plan view of a sprocket wheel and a portion of theendless magazine belt shown in Figure l,

Figure 15 is a detail view showing a means for actuating the sprocketwheel shown. in Figure'll,

Figure 16 is a detail view showing a clutch mechanism which forms partof the work table raising means,

' portion of the means for raising and lower- Figure 17 is a sectionalview along the line l7-17 of Figure 16,

Figure 18 is a sectional view of the portion of the clutch mechanismshown in Figure 16 at right angles to the latter figure.

Figure 19 1s a top plan view of the magazine as shown in Figure 1.

Figure 20 is a sectional view through a tool-holding sleeve of themagazine, showing the drill spindle in operative connection with thetool-holding chuck,

Figure 21 is a similar view showing the tool-holding chuck asdisconnected from the drill spindle,

Figure 22 is a bottom view of the drill spindle shown in Figure 21,

Figure 23 is a plan view of the tool-holding chuck shown in Figure 21,

Figure 24 is a detail view of a portion of the work table raisingmechanism, and Figure 25 is a fragmentary view of a portion of themechanism illustrated in Figures 16 and 18.

Referring now particularly to Figure 1, I have shown therein a base 1upon which is mounted a column 2 which supports the frame 3 of the drillpress. The latter has the usual cone pulley arrangement lWhlCll isarranged to be driven by a similar pulley arrangement 5 one drive shaft6, bearing the zusual driving pulleys, such as that shown Carried by theupper portion of the frame 3 is a housing 8. for the clutch mechanismlike that shown in Figures 2 and 3. As will be seen from Figure l, theshaft 9,

upon which the pulleys 4 are mounted, is journalled in bearings 10carried by the frame 3, and enters the housing 8. At the end of theshaft 9 is a pinion 11 and also a gear 12, both the pinion and the gearbeing rigidly secured to the shaft 9. The pinion 11 is arranged to meshwith a gear 13, loosely mounted on a shaft 20 in the housing 8. The gear12 engages a beveled gear 14. By this arrangement the gears 13 and 14are driven in opposite directions. The gear 13 is provided with a clutchmember 13 The gear14 has a clutch member '14. These clutch members 13and 14 are designed to be engaged by a movable clutch member 15 whichsurrounds the spindle shaft 20, and which is splined to the shaft so asto move therealong, but to cause the rotation of the shaft when inengagement with either of the clutch members 13 or 14 The engagement iseffected by means of a handle 16 which is pivotally mounted in thehousing at17 and which is provided with a yoke 18 arranged to engage ina groove 19 in the clutch member 15, so that by operating the handle 16,the clutch member may be shifted to bring the spindle shaft 20 intooperative engagement with either of the gears 13 or 14', so as to turnthe spindle in either direction at will. The spindle 20 passesdownwardly through the housing 8'and through the casting 21 (see Figure10) which is supported by an extension of the frame 8. W'ithin thishousing is a slidable feed rack 22 (see Figure 10) which has rack teeth23 arranged to engage a pinion 24 mounted upon or a part of a sleeve 25to turn with the sleeve, and hence toraise or lower the rack 22. At theouter end of the sleeve 25 is a wheel 26. having a series of nobs 27 bymeans of which the wheel. may be turned. In order to facilitate theturning, I provide a handle 28 which is hinged at 29 to a rod 30 whichenters the sleeve to which is secured a spring 31, the oppositeend ofthe spring being secured to a rod 32 which extends through a reducedportion of the sleeve 25 and has a head 33 which forms part of a thrusthearing 34. By means of this arrangement, the handle 28 may be swungoutwardly and rotated so as to enter between any two of the nobs 27,when it may be used as ahandle for turning the wheel 26, the spring 81keeping the handle in its shifted position while permitting it to bemoved to another position. The spring 31, while it has a tendency tohold the handle/lever 28 at a right angle, it is made to have a greatertendency to hold lever 28 standing straight out or in a parallel linewith sleeve 25. The purpose of this is to bring the weight into assmallfa radius as possible, so as to permitthe quick downward. andupward return of the spindle shaft, and at the same time not interferewith the tool magazine. The feed rack 22 bears at its upper end alateral extension which surrounds the spindle shaft. The upper and lowerthrust bearings86 and 37 respectively (see Fig.

spindle shaft, a larger number of magazine tool-holding sleeves may beused with a given size magazine, as will appear later.

As will be seen from Fig. 1, a cable 38 is secured to the upper end ofthe feed rack 22 and passes over pulleys 39 and 40 on the inside of theframe 3, being secured to a counterweight 41. A handle 42 is alsoprovided on the portion 35 of the feed rack 22 which surrounds thespindle, shaft 20.

In that form of the device shown in Figure 1, a magazine is provided forholding the chucks for the variousbits or drills or any other suitabletools that are to be used. This magazine comprises a circular plate43(see Fig. 19) having downwardly extending sleeves 44 which may be madeintegral with the plate 01 secured thereto in any suitable manner. Theplate has a central hub 45 which surrounds the column 2 and about whichthe magazine may be rotated. Each sleeve 44 (see Figs. 20 and 21) isprovided with a chuck 46, the lower end of which has a tapered socket 47to receive the shank 48 of the tool 49. The upper end of the chuck isprovided with recesses 50 and extensions 51, the recesses 50 beingarranged to receive extensions 52 of the drill spindle 20 and theprojections 51. arranged to enter recesses or sockets 53 ofcorresponding contour, so as to lock the spindle to the chuck. In orderto positively lock the two together, I provide spring locking dogs, suchas that shown at 54 in Figures 20 and 21. Thelower end of the dog issecured to the chuck body by screws '55 or by any other suitable means.The normal position of the dog is. that shown in Figure 21 in which theends 54 are held outwardly away from the drill spindle. I is inengagement with the socket and has forced the latter downwardly, theends 54* of the dogs 54 enter recesses 56 in the drill spindle, therebypositively locking the parts together, as shown in Figure 20. On theretraction or raising of the drill spindle, the chuck is raised to aposition where the dogs 54 will spring outwardly, thereby releasing thedrill spindle automatically.-

Referring now particularly to Figure 16, it will be seen that the hub 45of the magazine is provided with a gear 60. Just below the gear are ballor roller bearings 61v which When, however, the drill spindle ported onan arm 64: which has a sleeve 65 slidable with respect to the column 2.The sleeve 65, as will be seen from Figure 24, is provided with alaterally extending flange 66 which is arranged to enter between twolaterally extending flanges 67 on a collar 68 throughwhich a screw shaft69 passes. This screw shaft is journalled at its lower end by;

a socket 70 and extends upwardly underneath the magazine, as best shown1n Figures land 16. The upper .end of the screw shaft 69 has a reducedportion 69- (see Fig ure 18) which is of uniform width. Above thisreduced portion is a further reduced rounded portion 69 about which acoil spring 71 is disposed. The upper endof the coil spring restsagainst a head or washer 72 held in position by a cotter pin or othersuitable means. A cap 73 fitsover the upper end of the reduced portionsof the shaft 69 and has a portion 73 upon which the spring 71 alsorests. The lower portion of the cap is provided with recesses74 (seeFigure 18) to receive lugs 7 5 on a gear 76 which loosely surrounds theshaft 69 and is in mesh with the gear 60. As will be seen from Figure16, the collar, or enlargement 62 has ian -extension 62 which forms ajournal for the shaft 69. This extension has an upright 76, at the topof which is pivotally mounted a lever 77 which is connected by a link 78with a handle 79 pivotally mounted at 80. Theopposite end of the lever 77 is connected by a rod 81 with a head 82 which is disposed on theinside of the cap 7 3 (see Figure 18).

The arrangementjust described is such that when the handle 79 is in theposition shown in Figurel6, the cap 73 is in driving engagement with thegear 7 6, so that when the magazine 48 is rotated, the shaft 69 will beturned through the medium of the gears 60 and 76, thereby causing thetable 63 to lower or raise, depending upon the direction in which themagazine is turned, When, however, the handle 79 is thrown downwardlypast its center, then the cap 78 will be raised against the tensionofthe spring 71, whereupon the gear 76 willrotate idly, and the screwshaft 69 will not be turned when the magazine is rotated.

In order to lock the magazinein any of its shifted positions, I providea Y-shaped locking member 83 (seeFigure '1) which is hinged at 84 to theframe 3 and which has a. portion 85 arranged to enter between thesleeves L4: in one of the spaces 86 (see Figure '19). Normally,however,'the locking member 83 is kept in the outer positionfree fromthe sleeves in any suitable manner, as by means of a spring 87 attachedto a portion of the frame. A link 1S secured to the locking member 85 atone end and to a treadle 89 which is pivoted at 90. On depressing theouter end of the treadle 89 the member 85 will be swung inwardly betweenthe two sleeves which happen to be in'regis tration, thereby locking theno agazine against rotation. Y i

In Figure 4 I have shown a modified form of the device, in which themagazine consists of aseries of sleeves 91 which are hinged together at92 and which are arranged to form an endless belt, passing around asprocket wheel 93 (see F igurel l) at one end and a similar sprocketwheel 94: at the other end The sprocket wheel 93 is mounted on thedownwardly turned portion 96 of along arm or framememher 96 which has aportion surrounding the column 2, upon which it is slidably mounted.being balanced by a counterweight 97. The forward sprocket wheel 94 isrotatable on the column 2. In order to move the endless belt to bringthe sleeves into position with respect to the spindle shaft to permitconnection of the latter with the tools in the sleeve tool-holders, Iprovide a lever 98 (see Figure 15) upon which is mounted a springpressed pawl 99 arranged to engage teeth 100 on the forward sprocketwheel 94. The lever has a hub portion 101 which surrounds the column 2so that when the lever is oscillated, the pawl will engage the teeth ofthe sprocket wheel, so as to rotate the latter and hence cause themovement of the endless belt.

In order to lock the belt in its adjusted positions, I provide theforward sprocket wheel 9-4- with recesses 102into which the end of alocking bolt 103 may project. Nor inally this bolt is held in aretracted position by means of the spring 10% in a housing 105underneath the arm 96. A. lever is pivoted at 107 on the frame 3, thelower end of this lever being pivotally connected by a link 108 to abell. crank lever 109, the outer portion of which forms a treadle 110. Aguide member 111 is secured to the arm 96 to guide the lever in itsmovement. It is obvious that by pressing the treadle 110 the lever 106will be swung to the left'in Figure l. As will be seen from Figure 7,the lever engages a shoulder on the locking bolt 103 thereby forcing itinto the openings 102 and thus locking the sprocket wheel 94: and hencethe endless belt, from movenient, as long as the a gear *117arranged tomesh with a gear" 118 on the screw shaft '119, whose lower end isjournalled at 120 on an extension of the frame member 95, whose upperend is joure nalled in a socket'121. As will be seen from Figure 9, theshaft 112 has a collar 122 below which is a slidable gear 123 which issplined to the shaft 112, but which may be moved by means of the lever124: into or out of mesh with the teeth 100 on the sprocket wheel 9%.When the lever, 12% is turned in the position shown in Figure 9, thenthe gears 100 and 123 are in mesh and the gear 118 is driven to moveupwardly or downwardly on the screw shaft 119, at the same rate that thescrew shaft 112 moves downwardly. A collar 125 (see Figure 8) supportsthe arm 96 at its outer end, while the collar 122 (see Figure 9)supports. it near the column, so that the whole magazine may be raisedor lowered when it is rotated by means of the lever 98, as described.

The table 63 may also beraised or lowered, and to this end I provide arod 126, preferably of square cross section which is designed to enter asquare opening running I lengthwise of a threaded shaft 127, which isjournalled at 128'in the base and whose upper end is engaged by athreaded portion 129 on a collar130 which supports the hub 130 of thearm which bears a plate 63. The

upper part of the rod 126 may be connected;

in operative relation with the magazine in precisely the same manner asthat indicated in connection with the arrangement shown in Figures 1 and16, and when so connected, the rod 126 will turn when. the magazine ismoved, thereby turning the threaded shaft or rod 127 and causing theraisi g or lowering of the work table 63. i

In the modified form of'the device shown in Figure-11,1 provide a plateor ring 131 bearing a plurality of individual magazines 132, each ofthese being of the type shown in Figure 19. In this form of the device,the main plate 131 may be rotated to bring any of the magazines intoapproximate position, and then the individual magazine may be rotated tobring the particular tool desired into registration with the drillspindle, thus providing a. great number of tools for a given-radius. Thedrill spindle, of course,

enters the sleeves, as'stated, and in order to provide for the entranceof the feed rack, I provide the openings, such as those shown at 43 132,93 and 94* in the plates 13, 132, and in the sprocket wheels 93 and 94:respec-. tively. This permits the drill spindle to be fed asfar asdesired.

In Figure 13 I have shown another modified form of the device, in whichthe column 2 is provided with upper and lower ears or brackets 133 and13 1 respectively, which may e secured to the column in any suitablemanner. 'A frame 135 is provided which fits in between the ears andwhich may be held in' used in the ordinary manner by fitting an ordinarytool on the drill spindles Two of these magazines may be used byproviding a second frame, such as that shown at 135 and a duplicate ofshaft 137, and a second magazine,one on either side of the frame, sothat, for instance, one may be supplied with tops for cut-ting threadsor other tools, while the other magazine may hold drills or other tools.One of these magazines may be swung in under the spin dle from'theright, and the desired tool used, and then it may be swung around backout of the way, and the magazinevfrom the left is swung inunder thespindle, and thedesired tool used, or both magazines may be swung backout of'the way and the drill press used in the old ordinary way.

I claim: I

i 1. In a drill press, a frame, a driving spindle carried thereby, a.magazine comprising an endless belt of tool-holding sleeves hingedtogether, means for moving the belt to bring any of thesleeves intoregistration with the driving spindle, and means for raising andlowering said magazine through the movement of the endless belt. i

2. Ina drill press, a frame, a driving spindle carried thereby; amagazine. comprising an endless belt of tool-holding sleeves hingedtogether, means for moving the belt to bring any of the sleeves intoregistration with the driving spindle, means for raising and loweringsaid magazine through the movement of the endless belt, a work table,andmeans for'also raising and lowering the work table through themovement of. the endless belt.

3. In a drill press, a column, a frame supported thereby, a drivingspindle vertically slidable on said frame, anauXiliary frame, a sprocketwheel mounted for rotation about said column, a sprocket wheel mountedon said auxiliary frame, and. an endless beltof tool-carrying sleeveshinged together and arranged to travel aroundqsaid sprocket wheels 4. Ina drill press, a column, a frame supported thereby. a driving spindlevertically slidable on said frame, an auxiliary frame, a sprocket wheelmounted for rotation about said. column, a sprocket wheel mounted onsaid auxiliary frame, an endless belt of tool-carrying sleeves hingedtogether and revolving the belt against movement at will, and meanslarranged to travel. around said sprocket Wheels, and means for causing aprogressively forward movement of the endless belt to bring said sleevesinto registration successively with said drillspindle.

5. in a drill press, a column, a frame supported thereby, a drivingspindle vertically slidable on said frame, an auxiliary frame,

a sprocket wheel mounted for rotation about said column, a sprocketwheel mounted on said auxiliary frame, an endless belt of toolcarryingsleeves hinged together and arranged to travel around said sprocketwheels, means for causing a progressively forward movement of theendless belt to bring said sleeves into registration successively withsaid driving spindle, and means for loclring the endless belt againstmovement, at will. i i

6. In a drill press, a column, ported thereby, a driving spindlevertically slidable on said frame, an auxiliary frame,

a sprocket Wheel mounted. on said auxiliary frame, an endless belt oftool-carrying sleeves hinged together and arranged to travel around saidsprocket wheels, means for causing a progressively forward move ment ofthe endless belt to bring said sleeves into registration successivelywith said driving spindle, means for locking the endless actuated by theprogressive movement of the a frame supbelt around the sprocket wheelsfor raising or lowering the belt.

7?; In a drill press, a driving spindle, a,

magazine comprising an endlessbelt of toolholding sleeves hingedtogether, means for supporting the endless belt to permit themovementthereof to bring the tool-holding sleeves into registration withthe driving spindle successively, a work table, and

holding sleeves hinged together, means for supporting the endless beltto permit the movement thereof to bring the tool-holding sleeves intoregistration with the driving spindle successively, a work table, meansactuated by the movement of the belt for raising or lowering the Worktable, and

movement at any point at will. i

9. In a drill press, a column, a frame car ried by the column, aslidable driving spindle carried by the frame, a magazine comprising abody portion rotatably disposed on said column, and having aplurality ofrotatable plates, each'of said plates having tool-holding sleevesarranged to be brought into registration with said driving spindle.

, CHARLES E. COX.

means for locking the endless belt against

